Locomotive-boiler



W. SHINN.

LOCOMOTIVE BOILER.

APPLICATION FILED MAR.1.1919.

1,328,303. ,rammed Jan.2o,1920.

UNITED STATES Parleur onnren.

WILLIAM SHINN, OF GRANDIN, MISSOURI, ASSIGNOR OF ONE-HALF T0 CHARLES SHINN,

v OF GRANDIN, MISSOURI.

LOCOMOTIVE-BOILER.

Application filed March 1, 1919.

To all whom t may concern:

Be it known that I, I/VILLIAM SHINN, a citizen of the United States, residing at Grandin, in the county of Carter and State of Missouri, have invented certain new and useful Improvements in Locomotive-Boilers, of which the following is a specification.

This invention seeks to reduce the liability of a locomotive boiler to explode, and to provide a construction which will economize in the consumption of fuel by exposing the water more thoroughly and eifectually to the action of heat than in constructions heretofore known. The invention is illustrated in the accompanying drawings and consists in certain novel features which will be, hereinafter first fully described and then more particularly pointed out in the appended claims.

In the drawings- Figure 1 is a longitudinal section of a locomotive boiler embodying my improvements;

Fig. 2 is a transverse section on the line 2-2 of Fig. 1;

Fig. 3 is a transverse section on the line 3-3 of Fig. 1.

In carrying out my invention, I provide the usual cylindrical water chamber 1, the outer wall of which is extended downwardly, as at 2, at its rear end to provide the outer wall of the re-box. A flue sheet or head 3 is provided across the water chamber 1 in rear of the front plate or head 4 and the usual stack 5 rises from the smoke chamber provided between the two heads 2 and 4. The hre-tubes 6 are supported at their front ends in the head 3 and open through the same, while the rear ends of the said tubes are supported in and open through a head or plate 7 which is disposed in advance of the rear` end of the boiler and terminates short of the side walls of the same. An arch 8 extends between the upper edge of the head 7 and the rear wall plate 9 of the boiler and thereby bridges the space between the said plates and aids in supporting the tube sheet or head 7. The sides of the re-box are double, as shown clearly in Figs. 2 and 3, and are dened by inner walls 10 which are disposed in spaced relation to the outer side walls 11 and are connected at their lower ends directly to the outer walls,

Specification of Letters Patent.

Patented Jan. 2o, 1920.

Serial No. 279,973.

as shown at 12. The inner walls 10 are connected by an upper crown sheet 13 and a lower crown sheet 14 which extend forwardly from the rear wall plate 9 and are joined at their front edges, as shown at 15, thereby providing a water space in communication with the space between the inner and outer walls 10 and 11 so that the water may circulate freely therethrough and be readily heated and convertedinto steam. An opening 16 is provided in the rear wall plate 9 and a fuel chute 17 is provided at the rear-of said opening to permit the insertion of fuel into the fire-box. The opening is controlled by a door 18 in the usual manner. An inner rear wall 19 is provided in spaced relation to the rear wall plate 9 and is joined thereto at its lower end, as shown at 20, in the same manner that the inner side walls are joined to the outer side walls. The water space between the inner and outer rear walls communicates with the space between the upper and lower crown sheets and the upper crown sheet is secured to the outer rear wall, as shown at 21, while inner vertically disposed plates 22 connect the said crown sheet with the arch 8 to dene a fire space at the rear ends of the fire tubes 6, the space between the said plates 22 and the outer side walls 11 communicating with the space between the crown sheets and the space between the inner and outer walls 10 and 11, as clearly shown, so that water will be exposed to the heat of the fire-box at the rear of the same and at both sides thereof. Access may be had to the fire tubes through a door 23 so as to readily clean the same. At the front of the lire-box is an inner wall 24 which is in spaced relation to the front wall 2 of the fire-box and is secured thereto at its lower end, as shown at 25. The-upper end of the wall 24 is secured to or formed integral with the lower wall 26 of the water chamber leading to the flue sheet or plate 7 and it willbe noted that the said plate orwall 26 is spaced above the upper crown sheet 13.

In use a re is kindled within the fire chamber in the usual manner, it being understood that grate bars (not shown) extend between the points 20 and 25 in the usual manner. It will be readily observed that the crown sheets provide a water space over the grate bars which eXtends toward and nearly to the vertical water leg constituting the front wall of the fire-box. It will also be noted that'there is a water leg at each side and at the rear of the re-boX 'so that when a fire is kindled the heat will play directly upon water-containing chambers and will, therefore, very quickly raise the sheets'will .retard-fthe flow of the heated cijn'rents and, con'setp'iently7 will retain the heat for the maximum period within the firef-box. As the heated currents pass up in front ofthe crown sheets theylwillbe diverted rearwardly land flow throughthe narrow space above theI crown sheetsI and between the same and thei bottom of the main water chamber and will then rise in the spacedbetween they l'ue Vsheet 7 and rear wall of the boiler to entertherear ends of there tubes.` They will thenpass foru wardly and out through the stack '5 in the us'ualmanner. It will be reaidily noted that by providing the upper and lower crown sheetsv spaced from `and below the bottom of the main water chamber, l anrenabled to use longer fire tubes than has been heretofore possible without increasing the length of lthe boiler and as the fire tubes are not exposed directly to the re the safetyr of the boiler is increased.y

thereof, spacedinner and outer walls extending from the bottom of the water chamberA and constituting' thefronit wall of the lire-boxv and secured together at their low-er ends7 and spacedy vcrown 4sheets `eteiidin-g a'crbss the ire-boxbelow the Y and spaced from Vthe inner irht wall off the fire'b'oX and Aforming; a water compartment in communication with the between the'ihnerandouter side walls. y

t 2. A locointive boiler l'iayiiig wat'er chamber with its rear portiondi'sposed 'over the fire-box, a water lieg 'e'teiding fron'ithe water chamber yand forming theV frontf'f thchrelbox, the bottom wall of the water' chamberfterminating inadvance' of the y ber, fire tubes extending from sai'd'ihie sheet through the water chamber to the 'frontend thereof, vand spaced crown ysli'eva'ts seciirezl to the rearwall of the water chamber 'and connected at their front'ends andsp'acedffroin the bottom of the water chamber and "from the water leg depending therefrom. y

In testimony whereof l my signatl'lre.

wILLiAM si-HNN. [t s.) 

